Twitter-icon.com has a great selection of twitter icons and buttons.
Site: maestroteca.com (Portal educativo. Enlaces educación. Enlaces Educativos. Maestroteca - Tus favoritos de webs educativas)
Recursos, materiales, enlaces educativos - educación - TiC. Portal educativo para que los maestros/as aprovechen el enorme potencial de Internet en su trabajo.
Do you have a twitter account? If so it's important
to get as many people as possible to follow you.
Great follow me icon captures attention of the visitors
and brings more followers to your twitter account.
Choose great twitter icon for you website!